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<head><meta charset="utf-8"><title>how are things looking · t-compiler/wg-nll · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/index.html">t-compiler/wg-nll</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html">how are things looking</a></h3>

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<a name="136704295"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136704295" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136704295">(Oct 29 2018 at 13:06)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> trying to come up to speed — for some reason a bajillion notifications today — how are things looking right now? any last minute fires?</p>



<a name="136704309"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136704309" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136704309">(Oct 29 2018 at 13:07)</a>:</h4>
<p>no i don't think so</p>



<a name="136704318"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136704318" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136704318">(Oct 29 2018 at 13:07)</a>:</h4>
<p>I've been working on the .nll.stderr review</p>



<a name="136704321"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136704321" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136704321">(Oct 29 2018 at 13:07)</a>:</h4>
<p>the two biggest issues I've found are:</p>



<a name="136704339"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136704339" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136704339">(Oct 29 2018 at 13:07)</a>:</h4>
<p>1. there's one place where borrowck=migrate is mistakenly downgrading an error to a warning</p>



<a name="136704382"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136704382" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136704382">(Oct 29 2018 at 13:08)</a>:</h4>
<p>(its for some reason <em>missing</em> the error that AST-borrowck does generate)</p>



<a name="136704388"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136704388" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136704388">(Oct 29 2018 at 13:08)</a>:</h4>
<p>we'll probably want to figure out a fix for that and backport it to beta</p>



<a name="136704403"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136704403" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136704403">(Oct 29 2018 at 13:08)</a>:</h4>
<p>2. NLL is rejecting a particular use of unions that is supposed to be sound.</p>



<a name="136704416"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136704416" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136704416">(Oct 29 2018 at 13:09)</a>:</h4>
<p>Neither of these things is worth upsetting the release</p>



<a name="136704425"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136704425" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136704425">(Oct 29 2018 at 13:09)</a>:</h4>
<p>if you want more info about item 1... I'll probably file a bug about it sometime soonish</p>



<a name="136704442"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136704442" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136704442">(Oct 29 2018 at 13:09)</a>:</h4>
<p>just wanted to keep going with the .nll.stderr review while I have my groove going</p>



<a name="136704448"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136704448" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136704448">(Oct 29 2018 at 13:09)</a>:</h4>
<p><span class="emoji emoji-1f44d" title="+1">:+1:</span></p>



<a name="136704449"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136704449" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136704449">(Oct 29 2018 at 13:10)</a>:</h4>
<p>ok</p>



<a name="136777946"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136777946" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136777946">(Oct 30 2018 at 13:56)</a>:</h4>
<p>whoa <span class="user-mention" data-user-id="116122">@simulacrum</span> beta-accepted PR <a href="https://github.com/rust-lang/rust/issues/55494" target="_blank" title="https://github.com/rust-lang/rust/issues/55494">#55494</a> :)</p>



<a name="136777972"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136777972" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136777972">(Oct 30 2018 at 13:56)</a>:</h4>
<p>I guess I have no problem with that. I assume the beta-to-be-released this week has already been cut...?</p>



<a name="136788069"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136788069" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136788069">(Oct 30 2018 at 16:27)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> Yes, this weeks beta is cut</p>



<a name="136788155"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/how%20are%20things%20looking/near/136788155" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/how.20are.20things.20looking.html#136788155">(Oct 30 2018 at 16:28)</a>:</h4>
<p>The patch looked minimal and we've essentially just cut that beta, also soundness bug -- so all together seemed accept-worthy</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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